Start by marking and cutting the two Color 1 and two
Color 2 2-7/8" x 28-3/4" strips into ten 2-7/8"
squares from each strip...

Cut each of the 2-7/8" squares in half once on
the diagonal, and using a scant 1/4" seam allowance sew them
together into half squares. Trim these back to measure 2-1/2"
if needed. Make 40 of these...

Now mark and cut the Color 1 and Color 2
2-1/2" x 17-1/2" strips into seven 2-1/2" squares
from each strip...

Sew three Color1 and three Color 2 1-1/2" x
39" strips right sides together along a long edge, and using a
scant 1/4" seam allowance. Press to dark sides. Make two units
like this. Cut the two longer strip sets at
6-1/2" intervals for a total of twelve strip units. Also
sew together three Color 1 and three Color 2 1-1/2" x
6-1/2" strips in the same manner, to give you thirteen units
like this...

Sew three Color1 and three Color 2 1-1/2" x
39" strips right sides together along a long edge, and using a
scant 1/4" seam allowance. Press to dark sides. Make two units
like this. Cut the strip sets at 1-1/2" intervals for a
total of seventy-two strip units...on to Page 2!